Cable-telegraph system.



I. KITSEE.

CABLE TELBGBPH SYSTEM.

APPLIUATIQN'YILED Arima. mnu.

^ 988,878. Patented Ap1-.4. 1911.

7572 Mmmml 4 mnn'nnrnrnenern ,sYs'riiiSn rb'auahamamayf'cammf' Befaknewn that' Lirama Knew, a 'Ciuzen" of"the'United"'States, residing in .the city'cf Philadelphiacounty ofy PhiladelphiaQand State 'of Pennsylvania, have in- ,y'ented certain new and useful 'Improvements in` Cableiflel'egraph Systems, of 'Which the follovvin a specificationj U v jMyinventlon relates to'telegraphy over a long linefor cable, suchas a submarine cable,

aving "relatively great capacity, H 'It is"the object'ofmy invention to lcep .fthe line or :ableinlaI sensitive condition so th'abtlie signal impulses transmittedl from '15 one endto the other are ableto quickly af- -f e( :t or ,control vthedistant 'receiving instruj. zo.

ment;

`A 'long line or capacity Vbasa relatively` great vtime constant that is,kv it requiresa considerable .y time before yetll so;employthelinefor cable that in effectthe..timeaxconstant. is reduced so that 'more rapid -andapositive signal-ing. is possi-y ble.` To this,end,;Icontinuously, impress I upon the 'lineorcable current impulses, preferably alternating Vin polarity, these impulses traversing the cable at all times, whether or not ymessages are being t;ransmitted. l l'lhen, I-i-mpress u von :thelme orcable the signal impulse'sf provide also .means for neu- .tralizingin the receiving apparatusithe Vef f: Yfects ofthe impulses ycontinuously impressed upon .the line orl cableandalso-meansl for neutralizingLin thefreceiving yinstrument the effects of signal impulses transmitted `toline or'cab'lezfrom'thesamestation f My-inventionwfresides in other" features hereinafter described and claimed.

*Foranfillustratiorl of some of the' forms my'invention'mayftakmy reference.' is'y to be had to' the accompanying drawing-in which:

Figure f1 is adiagramrnatic'view of the'ap-` paratus' :at *one-end' "of ia" line "or cable; r-lig 2 "is" 'a diagrammatic'yiewfjof a modified means* foreontiniiously impressing impulses upon the `li'ne or cable. Fig. 3 is a diagrammeans"h fr continuouslyimpressing impulses upon the-line o rfcablef i.. i 4Spc-citi cation ofi'Letters Patent.

y pplication led April 23, 1909. Serial No..491,7].9.

Fig.' 4 is ai.liag'ranr-y l HED STATESPMEM OFFCE- l ff. lrionflnrrsnn, :oE-ri-IILADELPHIA, PENNSYLVANIA.

PatentedApr. 4, `1911.

matic view of another means for"continu` ously impressing impulses upon the line or cable.

p Referring to Fig. .1, C is the line or cable having great capac1ty, as, for example, a f

submarine cable. E are serially connected the opposed sources of energy b and b1, one of greater power than the other, anda. resistancer. From one terminal of the resistance r leads a con ductor lhto the brush 2 bearing upon the circ umferentially. continuous portion 3 of a' Between it and the earth commutatorl which is continuously driven at any desired speed by `any suitable means as, for example, an electric motor M. A second brush 5, bears alternately upon insulat' ing material and projections from the continuous ring 3. The result is that there is a periodic closing and opening of the circuit including the conductors 1, 6, source b and resistance fr. Vhen this circuit is closed, the source b1 is active inimpressingcurrentupon the line or cable C, andwhen the circuit is Open, the source bovercomes b1 and current in Aopposite direction is sent to the yline or cable.L4 Iny consequence, ,byV the rotation of thecommutatorl 4, impulses alternating in polarity are continuously impressed upon the line or cable. 'l i The number of cells in the sources and bl'maybe different than illustrated, the number of cells in eachsource being; made suitable to the conditions under which operation-is necessary. In series between the line o1' cable C and earth E are 'also connected the opposedsources b2 and b3, one comprising a greater number ofcells than the other. ln shunt `to Ythe source b3 is connectedI the operators key 7c and a resistance r1. Anda secondcircuit'in shunt to the source b3 includes the adjustable resistance r2, soun-feb, the adjustable transformer pri- And in shunt cuit. including the adjustable resistance r4 and the adjustable primary p1 of the transformer.A ln series with the line or cable C is theprimary 722 traversed by both the ais thetransiormer secondary in whose circuit-isincluded the 'signal translating inV strument llt, Aas arelay, siphon recorder, or Y terial, vwhether, or not the impulsesso im-lv any other suitable apparatus.. At the other end of the cable C there may be employed apparatus similar to that shown in Fig. 1 and similarly and symmetrically disposed with relation tothe cable, though other apparatus may he employed at the distantv end of the cable. It, at the distant end ot a station, means are employed for continuously impressing-upon the lineor cable im pulses alternating Vin polarity,-it is immapressed upon the cable at the distant end be in phase with those impressed at the home end.

In the" arrangement shown in Fig. l, or

the equivalent thereof, the -primary Wind.l

.is closed, the battery b3 is practically short cireuited through the resistance 7, 1 and the source b4 will etfectually produce the neutralizing ett'ect.

The operation is as follows: The commutator a being rotated at suitable speed, im-

pulses alternating in polarity are impressed upon the line or cable "C, as above described.` The strength of these impulses maybe controlled by adjusting the resistance r4 in the shunt circuit, and by suitably adjusting' and connecting ythe primary p1, the etect of the continuously produced impulses traversl ing the primary 'p2 upon'the seeondarys is neutralized by the inductive effect upon the secondary s by the primary .p l. Similarly, the signal impulses transmitted to line' y by manipulation of thekey la', these impulsesl also-l alternating in' polarity, are neutralized in their effect u on. the secondary s.' by the adjustable-prlmary Thus, both the vcontinuouslyvimpressed impulses and the si'nal impulses are ,neutralized a's to their ve ects ,upon the home receiving apparatus or instrument R. .There being continuously i present on the line or cable current impulses,

such impulses assumed to be arriving from a distant station, they traverse the primary .p2 but may beof such strength or of' such frequenc'yl as not to c ause. the instrument R torespond, but causev it .to be in sensitive.

condition or .on the verge of response, so

.that any 'signal impulses transmitted from .'thedist-a-nt' station on arrival traverse theyI primat-y p2' and by inductionin the secondarys positively and quickly actuate or con- J h having greatcapaclty, of means for continuf' trol the instrument. .R. Since there are impulses continuously` existing on the. line or cable, 'ity is the ve`I'1ergy of these impulses which' 'isxlconsumed in chargingthe line essere or cable and the impressed signal impulses are then the more quickly transmitted to the distant station to affect or control the receiving apparatus. I

In' Fig, 2, a- 'modified arrangement of means for continuously impressing impulses upon the line or cable is shown. Here, in

place of the commutator 4, of F ig. 1, is employed the vibrating armature or tongue# 7 which continually operated by the electro magnet 8' whose winding is included in series with the tongue or armatureil', the contact 9,- and the battery b5. When the tongue 1s in engagement With the vContact 10, the circuit including. conductors' 'l ,and 6 is closed.' vAit this moment ithecircuit oit' the magnet 8 is broken'andthe spring again 'retracts the armature 'or'. tongue 7. This cycle of operation continues and as a result, impulses alternating in polarity are impressed upon the line or cable. rlhe shunt circuit including the adjustable resistance 7'* is again provided and in. the conductor l1 of such shunt circuit may be serially conf nected the primary '791, as shown in Fig.. l,

or other neutralizing means.

In Fig. 3, is a. further arrangement ior continuously impressing impulses upon the line or cable. Here, the commutator apparatus shown in Fig. '1 is employed, and in 'a circuit in shunt to the resistance 1', sources b, b1, is connected the primary p3 of an induction coil or transformer 'Whose secondaryI s1 is' connected between the line -or cable C and earth E. Themin shunt to this secondary s1 is connected the adjustable resistance r4, and in the shunt circuit 'conductor l1 maybe included the fprimary p1 of the transformer shown in Fig. l, or other neutralizing means.

v In 4, a magneto-or other generator G is shown serially connected between the `line or cable C and .the earth. E. And in shunt thereto is connected the resistance ,'y/A, and vin the shunt circuit conductor 11 may again be connecteda vneutralizing primary p1, s uchas shown in F ig. 1, or other neutralizing means. Y

l/lhile I ,have shown' several forms of means for continuously impressing' currentimpulses 'upon `the `line or cable, I Wishit to be understoodthat I amY notlimited to .these' ffeatures but that anysuitable means forthe purpose may be `employed And it is also to be'understood' that -in place Vof the signal .impulse transmitter comprsin sources b2, b3, keyl 7c, etc., of Fig. 1, any other form' of signal impulse transmitter may be employed. i

What I claim is:.

l.. The combination with alineor cable ous-ly impressing thereon current impulses,

-receiving apparatus. at the same station,

ineanstor neutralizing theV e'ect of A.said

continuously' impressedI impulses upon said receiving apparatus, and means for impressing signal impulses upon said line or cable.

2. The con'ibination with a line or cable having great capacity, oi receiving appaatus, means for continuously impressing current impulsesupon said line or cable, means for impressing signal impulses upon said line or cable, and means for neutralizing the etiect upon said receiving apparatus of signal impulses transmitted from the same station. l

3. The eoi'nbination with a line or cable having great capacity, of receiving appaatus, means for continuously impressing current impulses upon said line or cable, means for impressing signal impulses upon said line or cable, and means for neutralizing the effects upon said receiving apparatus of both the continuously impressed impulses and the 'signal impulses.

4. The combinationwith a line or cable having great capacity, of means for continuously impressing thereon current im pulses alternating' iii polarity, receivingap- 4paratus at the same station, means for neutralizing the effect of said continuously 'impressed impulses ot' alternating'polarity y upon said receivingapparatus, and means -for imlaressinr siOfnal im ulses alternatin i in polarity lupon said line or cable.

5.The combination with a line or cable ha-ving great capacity,'ot1 receiving apparatus, means for continuously impressi-ng current impulses alternating in polarity 'upon' said linc'or cable, Ameansfor impress- 4ing signal impulses alternating in polarity upon said line .or cable, and means for 'neutralizing theletfeet' upon' said receiving apparatus ofthe signal impulses transmitted from the same station.

6. The combination 'with 'a line or cable having lgreat capacityaot receiving appa.- ratus, means for continuously impressing current impulses alternating in polarity upon said line or cable, means for impressing signal impulses alternating in polarity upon said line or cable,- and means for 8. The combination with a liuc or cable I having great capacity, ci means for coiitinuouslyv impressing thereon current impulses, means t'or impressing signal impulses thereon. rt-iceiving apparatus at the saine station. an inductive connection between said receiving apparatus and said line or cable, and a circuit. in inductive relation with said receiving apparatus for neutraliz ing the effect thereon oi the signal impulses transmitted from the same station.

9. The combination With 4a line or cable having great capacity, of means for continuously impressing thereon current impulses, means for impressing signal impulses thereon, receiving apparatus at the same station, an inductive connection between said receiving apparatus and said line or cable,

a circuit in inductive relation with said receiving apparatus forneutralizing the effect -thereoii of the continuously impressed iinpulses, and al circuit in inductive relation with said receiving apparatus for neutraliz- 'ing the effect thereon ofthe signal impulses transmitted from the saine station.

In testimony whereof I have hereunto ailixed my gnature in the presence of. two

subscribing witnesses.

ISIDOR KITSEE. 'Witnesses ELEANOR T. MCCALL, ILE. Srnnvocii'. 

